KeyboardSettings+Kernel: Setting to enable Num Lock on login

Author: https://github.com/ForLoveOfCats
Commit: ce6658acc1
Pull-request: https://github.com/SerenityOS/serenity/pull/8417
Reviewed-by: https://github.com/gunnarbeutner

Kernel/Devices/HID/HIDManagement.cpp

@@ -98,6 +98,11 @@ void HIDManagement::set_maps(const Keyboard::CharacterMapData& character_map_dat
     dbgln("New Character map '{}' passed in by client.", character_map_name);
 }
 
+void HIDManagement::set_num_lock(bool on)
+{
+    m_i8042_controller->keyboard()->set_num_lock(on);
+}
+
 UNMAP_AFTER_INIT void HIDManagement::enumerate()
 {
     // FIXME: When we have USB HID support, we should ensure that we disable